-10r-21=-81

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Solution for -10r-21=-81 equation:


Simplifying
-10r + -21 = -81

Reorder the terms:
-21 + -10r = -81

Solving
-21 + -10r = -81

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '21' to each side of the equation.
-21 + 21 + -10r = -81 + 21

Combine like terms: -21 + 21 = 0
0 + -10r = -81 + 21
-10r = -81 + 21

Combine like terms: -81 + 21 = -60
-10r = -60

Divide each side by '-10'.
r = 6

Simplifying
r = 6

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